Omnicron Productions Ltd
- Top Floor, 10 Galatos Street, Newton, Auckland
Onduline Building Products
- 8C Marphona Cresent, Takanini,
Onehunga Primary School
- 122 Arthur Street, Onehunga, Auckland
Onepoto School
- 17 Fraser Avenue, Northcote, Auckland
Onyx Group Ltd
- 17 The Concourse, Henderson, Auckland
Optik Eyecare Newmarket
- 2a Gillies Avenue, Newmarket, Auckland
Opra Consulting Group Queens Arcade
- Level 3, Suite 302, Queens Arcade, 34-40 Queen Street, Auckland
Optik Eyecare Pukekohe
- 20 Hall Street, Pukekohe
Optimism
- Level 1, 1 Kingdon Street, Newmarket, Auckland
The Optimum Clothing Co. Ltd
- 14 Westech Place, Kelston, Auckland
Oranga School
- 21 Rangipawa Road, One Tree Hill, Auckland
Orange Productions – Exceptional Events Management & Design
- 6 Henderson Place Onehunga
ORB Communications Ltd
- Level 1, 214 Karangahape Road, Auckland
Orcon Internet Limited
- 28 The Warehouse Way, Northcote, North Shore
Organic Delights
- 867 kahikatea flat road, Waitooki
Orion Health Ltd
- Orion House, 181 Grafton Road, Grafton, Auckland 1010
Orlando Private Florist
- Ground Floor, George Courts Building, 238 Karangahape Road, Auckland
Osbournes Ltd
- 117 Mays Road, Onehunga, Auckland